#Anti-Patterns and Misuse

Patterns are tools, not goals. These are common misuses that reduce clarity and maintainability.

#Common anti-patterns

#Overusing Singleton

Singletons introduce global state and hidden dependencies. Prefer dependency injection or a scoped service.

#Factory for everything

Factories add indirection and boilerplate. Use them only when creation logic varies or needs isolation.

#God Facade

A facade that grows into a mega-service becomes a bottleneck and breaks modularity. Split by responsibility.

#Inheritance for minor changes

If you change only small behavior, prefer composition (Strategy/Decorator) over subclassing.

#Using patterns without a problem

If the code is simple, keep it simple. Patterns should solve real constraints.

#Red flags

• You can’t explain why a pattern is used.
• The pattern adds more code than it saves.
• Testing became harder after adding the pattern.